Pushpavanam, M. and Siluvaimichael, M. (2004) Multilayered zinc-nickel and zinc-cobalt alloys- corrosion resistance under simulated conditions and field exposure. Transactions of the Institute of Metal Finishing, 82 (05). pp. 164-168. ISSN 0020-2967

[img] PDF
Restricted to Registered users only

Download (6Mb) | Request a copy


Corrosion performance of zinc-nickel and zinc-cobalt alloys prepared as duplex and triplex layers were evaluated by the potentiodynamic polarisation method and a simulated salt spray test. The results were compared with those obtained in the field test under severe tropical marine conditions. The effect of a nickel undercoat was also evaluated. All tests were conducted with electroplated deposits with and without chromate passivation. The results indicate that their corrosion resistance was in the orderof Nil Zn-Co/Zn-Ni>Ni/Zn-Ni/Zn-Co>Zn-Co/Zn-Ni>Zn-Ni/Zn-Co>Ni/Ni-Zn>Ni/Zn-Co. However, in marine testing Ni/Zn-Co/Zn-Ni showed tendency to crack formation

Item Type: Article
Uncontrolled Keywords: Duplex/triplex coatings; Field exposure; Multilayer; Potentiodynamic polarization; Zinc alloys
Subjects: Industrial Metal Finishing
Depositing User: ttbdu cecri
Date Deposited: 06 May 2012 06:18
Last Modified: 06 May 2012 06:18
URI: http://cecri.csircentral.net/id/eprint/2508

Actions (login required)

View Item View Item